PC-Progress Discussion Forums

First, if you have not actually measured both wetting and drying curves, I do not think that you should be using the hysteresis option in HYDRUS. Second, your other questions: 1. Please, read the manual, where all the models are discribed in detail. 2. Parameter Qm expands the flexibility of the mod...

You probably encountered some numerical instability. Perhaps use a different model of hysteresis (e.g., Lenhard et al.). J.

You cannot use this option if you do not have values for all required inputs. J.

The problem listed above has been fixed a decade ago. My experience is that these two models give very similar results if correct input is used. See an example for a Nevada desert. Hargreaves.png Note that ETo is reference ET, not actual ET, and thus can be larger than precipitation (and almost alwa...

Please note that we have posted a large number of examples and tutorials on the HYDRUS website on how to use HP1, e.g., https://www.pc-progress.com/en/Default.aspx?h1d-tutorials#k6 You can also check this document: Jacques, D., and J. Šimůnek, Notes on HP1 – a software package for simulating variabl...

Since in the dual-permeability model there are two mobile domains, one needs to decide into which domain water flows (e.g., infiltration). However, in the dual-porosity model there is only one mobile (and one immobile domain), all water flow to the mobile domain. The interactions between the mobile ...

1. That's up to you whether you run HYDRUS in the direct mode or calibrate the model against your experimental data. I think that it is always better to start with the direct mode and then adjust the parameters in the inverse mode. 2. Note that all these parameters are very clearly described in the ...

I would think so. Although I have to admit that I do not have version 1 installed on my PC any longer since it is more than 10 years since we replaced it with version 2, and later with version 3. J.

At the end of the Solute.out file you get solute fluxes for top 3 observation nodes. If you have four observation nodes, then you do not get the info for the last one. While cvBot and Sum(cvBot) reports total solute fluxes, the observation node fluxes, i.e., cv and Sum(cv) are only convective fluxes...

I may have done some minor modifications, which I do not recall. Simply compare the two projects to find out. J.

I do not see any problem. Jl

Currently, there is not. I do not have time for that. One could perhaps hardcode something for this specific geometry, but I do not see myself coding something for general geometries. Note that you can manually edit the Domain.dat (a text file of the binary Domain.in file) file externally, using, e....

Not without seeing the project. J.

The root growth module with multiple plants has not been intended to work on sloped surfaces. That's something that would have to be developed as a new option. J.

If you click with the right-mouse button on the HYDRUS icon, you get a pop up menu. From this pop-up menu select "Properties". Under the Tab "Shortcut" you can see the fields "Target and "Start In". These fields give you the path where HYDRUS (the program itself, not its projects) is installed. You ...